Metal joint



L. H. JOHNSON 1,725,277

METAL JOINT Filed March 10; 1928 6 .5 III/mm Lconli. Johnsom 3 yum/W Quincy s UNITED STATES PATENT OFFICE.

LEON H. JOHNSON, OF LAKEWOOD, NEW YORK.

METAL JOINT.

Application filed March 10, 1928. Serial No. 260,700.

This invention relates to a sealed, water and holding the edge portion of the sheet or gas tight metal joint for use primarily against flange of sheet 1, and producing a with thin sheets of metal although it can sealed, water or gas tight joint which renders be employed with metal sheets of different the structure particularly advantageous in 5 thicknesses. It is an object of the invention the manufacture of boat hulls, liquid and to provide a sealed, water or gas tight joint gas containers, portable vaults, etc. which can be readily manufactured and form W'here two plates 5 are to be connected, the 5' a sealed connection between the parts, thereplate 1 will be provided with joints, such as by rendering the joint particularly useful described, on opposed edges, and said plate 10 in the manufacture of boats, pontoons, con will be interposed between and connected to tainers, etc. the plates 5,

lVith the foregoing and other objects in I am aware that metal joints have heretoview which will appear as the description fore been made wherein a plate has been in proceeds, the invention resides in certain sertcd between parallel flanges extending 15 novel details of construction and ccmbinafrom a second plate, thereby forming a tions of parts which will be hereinafter more double lap. Rivets have then been extended fully described and pointed out in the claims, through the lap. In practice, however, the itbeing understood that various changes may act of riveting the parts has caused one or be made in the construction and arrangement more of the thicknesses to bul e and it has 2 of the parts within departing from the spirit not been possible to get a sealed joint even of the invention as claimed. though caulking material has been used. By

In the accompanying drawing the pre providing a single lap the danger of bulgferrcd form of the invention has been shown. ing the material at the joint is practically In said drawing, eliminated and even though a bulge should Figure l is a plan view of the oint conbe produced, the pressure of the sealing lip stitutin the )IGSGHt invention. 11 3011 the ed e of the )late 5 and the com- Figure 2 is a section therethrough showpression of the caulking mate ial will result- 7 mg the relative positions of the parts prior in a complete seal.

to the sealing of the joint. \Vhat is claimed is: 5-H) Figure 3 is a section through the com- 1. A metal joint includinga plate, a flange pleted joint. extending therefrom, a lip integral with the Referring to the figures by characters of plate and cooperating with the flange to form reference, 1 designates a relatively thick plate a crotch, a sealing material in the crotch, and having an attaching flange along an-edge a second plate secured to and lapping the thereof, as shown at 2. A sealing lip 3 is flange, said plate thrusting against the sealmade integral with the plate and cooperates ing material and gripped by the lip. with the flange 2 to form a crotch for the 2. A metal joint including a plate, a flange reception of caulking or sealing material inextending therefrom, a lip integral with the dicated at 4. The plate 5 is adapted to be plate and cooperating with the flange to form 40 positioned on the flange 2 and while it is a crotch, a sealing material in the crotch, and

thrust against the caulking material, rivet a second plate secured to and lapping the holes are drilled through the lapping porflange, said lip constituting means for griptions of the flange and plate, Rivets 6 are ping the last named plate and for compressthen inserted and upset so as to secure the ing the sealing material against the edge 45 plate to the flange. Following this operathereof.

tion the lip 3 is forced against the adjacent In testimony that I claim the foregoing as portion of the plate 5, thereby compressing my own, I have hereto afiixed my signature. the caulking material, in the space provided LEON H. JOHNSON. 

